div{
    .tabbar{
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background-color: white;
        height: 50px;
        line-height: 50px;
        text-align: center ;
    }
    ul{
        display: flex;
        list-style: none;
        li{
            flex: 1;
            .active{
                color: red;
            }
        }
    }
}